Novel synthesis of low-agglomerated YAG:Yb ceramic nanopowders by two-stage precipitation with the use of hexamine

Кравцов, А.В.; Chikulina, I.S.; Тарала, В.А.; Evtushenko, Ekaterina A.; Shama, Marina S.; Tarala, L.V.; Malyavin, F.F.; Vakalov, D.S.; Lapin, V.A.; Kuleshov, D.S.

doi:10.1016/j.ceramint.2018.10.010

Cited by 18 publications

(4 citation statements)

References 48 publications

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“…Figure 1 shows a micrograph illustrating the typical morphology of the YAG ceramic powders synthesized by chemical precipitation [16][17][18]. Analysis of the SEM micrographs showed that the ceramic powders consist of agglomerates of primary particles sized about 150 nm.…”

Section: Resultsmentioning

confidence: 99%

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Tarala¹,

Кравцов²,

Chapura³

et al. 2022

MoEM

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The aim of this work was to study the effect of vacuum sintering conditions and cerium concentration on the optical, luminescent and thermal properties of yttrium-aluminum garnet based ceramics doped with Се3+ cations. Series of ceramic powders were synthesized and samples of luminescent ceramics having the composition Y3-хСехAl5O12 were synthesized where x was in the range 0.01 to 0.025 f.u. We show that the phase composition and grain size distribution of the ceramic powders do not depend on cerium concentration. Without sintering additives, an increase in vacuum sintering temperature from 1675 to 1800 °C leads to an increase in the optical transmittance of luminescent ceramic specimens from 5 to 55% at a 540 nm wavelength and an increase in the thermal conductivity of the samples from 8.4 to 9.5 W/(m ∙ K). It was found that an increase in cerium concentration leads to a shift of the luminescent band peak from 535 to 545 nm where as the width of the luminescent band decreases with an increase in vacuum sintering temperature from 1675 to 1725 °C.

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Section: Resultsmentioning

confidence: 99%

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Tarala¹,

Кравцов²,

Chapura³

et al. 2022

MoEM

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“…Therefore, the reaction reached the precipitation conditions to form precipitation. Reaction process is shown below: 33), 41) NH…”

Section: Resultsmentioning

confidence: 99%

Co-precipitation synthesis of Nd:YAG powders with high uniformity and regular crystal size

Han

Yan

Xie

et al. 2021

J. Ceram. Soc. Japan

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Nd 3x Y 3¹3x Al 5 O 12 (Nd:YAG) powders with high uniformity were synthesized by reverse-titration co-precipitation method. The precipitation formation process and dispersion mechanism of Nd:YAG precursor in coprecipitation process were analyzed, and the influence of the preparation technology on the dispersion of powders was explored by adjusting the concentration of precipitator, alcohol-water solvent and ratio of composite dispersant. In addition, through the analysis of the precursor calcination process, combined with SEM and particle size analysis, it is shown that, under optimum processing conditions, the powders have excellent particle uniformity, narrow particle size distribution and appropriate crystal size when calcined at 1150°C for 2 h.

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“…Saghir et al noticed that wet-milled powders underwent the greatest size reduction with a final average particle size of 0.29 µm and crystallite size of 10.13 nm (Figure 22), while Xu et al [221] Chemical co-precipitation is applied to homogeneous hydrolysis of various oxides. Many papers in the literature describe the production of nano-crystalline ceramic materials, e.g., ThO2 [224], cerium doped gadolinium gallium aluminium garnet with different Y-doping levels [225], low-agglomerated Yt-doped yttria-alumina garnet (YAG) (Figure 23a) [226], Ce-doped YAG nanophosphors [227], and barium calcium zirconium titanate (BCZT) ((Ba0.85Ca0.15)(Zr0.1Ti0.9)O3) with a homogeneous particle size of approximately 500 nm (Figure 23b) [228]. Chemical co-precipitation is applied to homogeneous hydrolysis of various oxides.…”

Section: Powders Preparationmentioning

confidence: 99%

“…Chemical co-precipitation is applied to homogeneous hydrolysis of various oxides. Many papers in the literature describe the production of nano-crystalline ceramic materials, e.g., ThO 2 [224], cerium doped gadolinium gallium aluminium garnet with different Y-doping levels [225], low-agglomerated Yt-doped yttria-alumina garnet (YAG) (Figure 23a) [226], Ce-doped YAG nanophosphors [227], and barium calcium zirconium titanate (BCZT) ((Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 ) with a homogeneous particle size of approximately 500 nm (Figure 23b) [228]. A method enabling control of agglomeration size of ceramic nanoparticles is spray drying.…”

Section: Powders Preparationmentioning

confidence: 99%

Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review

Winnicki

2021

Coatings

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Based on the recent analysis of various databases, cold spray (CS), the newest method among thermal spraying technologies, has received the unabated attention of hundreds of researchers continuously since its invention in the 1980s. The significance of CS lies in the low process temperature, which usually ensures compressive residual stresses and allows for the formation of coatings on a thermally sensitive substrate. This paper concerns the low-pressure cold spray (LPCS) variant employed for forming metal matrix composites (MMCs) with high ceramic contents and all-ceramic coatings. At the very beginning, the influence of LPCS process parameters on deposition efficiency (DE) is analysed. In the next part, the most useful feedstock powder preparation techniques for LCPS are presented. Due to the combination of bottom-up powder production methods (e.g., sol-gel (SG)) with LCPS, the metal matrix that works as a binder for ceramic particles in MMC coatings can be removed, resulting in all-ceramic coatings. Furthermore, with optimization of spraying parameters, it is possible to predict and control phase transformation in the feedstock material. Further in the paper, differences in the bonding mechanism of metal–ceramic mixtures and ceramic particles are presented. The properties and applications of various MMC and ceramic coatings are also discussed. Finally, the exemplary direction of CS development is suggested.

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Novel synthesis of low-agglomerated YAG:Yb ceramic nanopowders by two-stage precipitation with the use of hexamine

Cited by 18 publications

References 48 publications

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Co-precipitation synthesis of Nd:YAG powders with high uniformity and regular crystal size

Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review

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